I Capture the Castle question

I love the title and the way it sums up the novel.
Cassandra makes several references to how she's trying to "capture" different people and events. These things are all brought together by the castle so it makes sense to summarise them as "I capture the castle".
What she tries to do is write about what happens in her life and mostly to the people around her (like Pride and Prejudice). In this way, it's far more about the place than any individuals. The castle not only brings them all together though, it sort of becomes their lives. What's special, to Cassandra, about the castle is not the building but everything that happens within it.

I thought about it as more of a metaphor - someone going to battle against a fortress and finally winning after a long fight. Then going up to the top of the castle to hoist up their flag and feeling a sense of victory. Cassandra had a long, emotional battle with herself and in the end she finally captured her happiness, her castle.

I'm not wild about it, but I can't think of a better one. It takes place in a castle, and Cassandra is attempting to capture it in her journal.

I thought it was a play on words. You can literally capture a castle in a game of chess.

I found it enjoyably ironic. No-one captures a castle... a romance would suggest someone eventually gaining purchase of it, (view spoiler)[ but the end shows not (hide spoiler)]. The castle has always belonged to her...so it does not quite make sense. However in spite of it incongruity I thought it pleasing!

I love the title, I've always thought that it's so it's so soft and lyrical and beautiful-sounding. There are two different dictionary definitions for capture, "to take into ones possession or control" and "to record accurately in pictures and words" So I agree with Kathryn, I think it's about how she captures the castle and all the events and emotions that the castle encompasses through her words, giving you a picture of it as a whole.
There's also the term castle used as "castles in the sky", speaking of a dream one has. So you could see it as Cassandra capturing her dreams (which she sort of does (view spoiler)[ Rose is married happily to one of the brothers, which Cassandra thought she wanted and her father has begun to write again (hide spoiler)]) or taking control of her dreams, her future.
Alternately you could see it as an illustration of how Cassandra grows up throughout the novel. In the beginning Topaz and perhaps Rose are the women, the mistresses of the castle and Cassandra is still a girl but as she grows up a little she becomes to take possession of the castle in her own right, grow into a intelligent young woman. Just a few ideas :-)